22120321217 has 2 divisors, whose sum is σ = 22120321218. Its totient is φ = 22120321216.

The previous prime is 22120321187. The next prime is 22120321229. The reversal of 22120321217 is 71212302122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22120315441 + 5776 = 148729^2 + 76^2 .

It is a cyclic number.

It is not a de Polignac number, because 22120321217 - 2²² = 22116126913 is a prime.

It is a super-2 number, since 2×22120321217² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22120321192 and 22120321201.

It is not a weakly prime, because it can be changed into another prime (22120321297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060160608 + 11060160609.

It is an arithmetic number, because the mean of its divisors is an integer number (11060160609).

Almost surely, 2^22120321217 is an apocalyptic number.

It is an amenable number.

22120321217 is a deficient number, since it is larger than the sum of its proper divisors (1).

22120321217 is an equidigital number, since it uses as much as digits as its factorization.

22120321217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 22120321217 its reverse (71212302122), we get a palindrome (93332623339).

The spelling of 22120321217 in words is "twenty-two billion, one hundred twenty million, three hundred twenty-one thousand, two hundred seventeen".